Double-glazed windows and doors improve energy efficiency, security, and aesthetics. However, they need routine maintenance and cleaning to stay in good condition. Neglecting upkeep can lead to seal deterioration, reduced insulation, and costly repairs. 

This guide covers cleaning methods, maintenance steps, and when to consider replacements.

Why Maintenance Matters

Proper care ensures double-glazed windows and doors remain functional and visually appealing. Here’s why maintenance is essential:

• Energy Efficiency – Well-sealed double glazing helps maintain indoor temperatures, reducing heating and cooling costs.
• Preventing Damage – Regular upkeep prevents leaks, condensation, and frame deterioration.
• Enhancing Appearance – Clean and well-maintained windows improve the home’s overall look.

Cleaning Double-Glazed Windows And Doors

Cleaning should be done every 3-6 months, depending on environmental factors. Using the right methods prevents damage and keeps them looking new.

1. Cleaning The Glass

Materials Needed

• Mild detergent (dish soap or gentle cleaning solution)
• Microfibre cloth or soft sponge
• Squeegee or mop
• Warm water
• Bucket

Step-By-Step Guide

1. Prepare a Cleaning Solution – Mix a few drops of detergent with warm water in a bucket.
2. Apply to the Glass – Use a sponge or mop to apply the soapy water from top to bottom to prevent streaks.
3. Remove Excess Water – Use a squeegee in an ‘S’ pattern, starting at the top and moving downwards.
4. Dry the Surface – Wipe the edges with a microfibre cloth to prevent water spots.

Tip: Avoid ammonia-based cleaners, as they can damage coatings on the glass.

2. Cleaning The Frames And Sashes

Frames also need attention, especially if they are made of uPVC, aluminium, or wood.

Steps For Cleaning Frames

1. Remove Dust and Dirt – Use a soft brush or dry cloth.
2. Wipe with Soapy Water – Use a cloth dipped in mild detergent and warm water. Avoid abrasive materials.
3. Rinse and Dry – Wipe away any soap residue with a damp cloth, then dry with a soft towel.

Tip: Avoid excessive moisture on wooden frames to prevent warping.

Maintaining Double-Glazed Windows And Doors

1. Inspect For Damage

Regular checks can help catch issues early. Look for:

• Cracks in Glass – Even minor cracks can worsen over time.
• Damaged Seals – Worn seals affect insulation and allow moisture to seep in.
• Condensation – Moisture between panes indicates a failed seal.

How To Handle Minor Damage

• Cracked Glass – Temporary fixes like clear tape may slow damage, but replacement is necessary.
• Worn Seals – Small gaps can be patched with silicone sealant. For extensive damage, a professional replacement is recommended.

2. Lubricate Moving Parts

Hinges, locks, and opening mechanisms can become stiff over time. Lubrication helps them function smoothly.

Steps To Lubricate Moving Parts

1. Identify Areas Needing Lubrication – Check hinges, locks, and sliders.
2. Apply Lubricant – Use a silicone-based lubricant or light oil. Avoid WD-40, as it can degrade seals.
3. Operate the Window or Door – Open and close it a few times to distribute the lubricant evenly.

3. Prevent Condensation

Excess moisture reduces insulation efficiency and can lead to mould.

Ways To Reduce Condensation

• Increase Ventilation – Open windows periodically and use extractor fans in kitchens and bathrooms.
• Use Dehumidifiers – Helps lower indoor humidity.
• Check Seals – Worn seals allow moisture buildup between glass panes.

4. Maintain Locks And Hinges

Properly functioning locks and hinges enhance security and usability.

Cleaning And Lubrication Steps

1. Wipe Down Locks and Hinges – Use a damp cloth to remove dirt.
2. Apply Lubricant – A small amount of silicone-based lubricant keeps parts moving smoothly.

When To Replace Double Glazing

Even with regular maintenance, double glazing has a lifespan. Consider replacing if you notice:

1. Age Of The Windows

Double-glazed units last 15-20 years. Older installations may lose efficiency and insulation properties.

2. Persistent Condensation

If moisture appears between panes despite maintenance, the seal has likely failed and requires replacement.

3. Significant Damage

Severely cracked glass, warped frames, or deteriorated seals often mean full replacement is the best option.

Conclusion

Keeping your double-glazed windows and doors clean and well-maintained not only preserves their appearance but also extends their lifespan and efficiency. Regular upkeep prevents damage, improves insulation, and ensures smooth operation, saving you from costly repairs or replacements down the track. 

By following simple cleaning routines, checking for wear and tear, and addressing minor issues early, you can keep your home comfortable and energy-efficient all year round. If your windows show signs of significant damage or persistent condensation, replacing them might be the best solution for long-term benefits.

Frequently Asked Questions

How Can I Remove Stubborn Dirt Or Mould From Double-Glazed Windows?

For persistent dirt or mould, use a mixture of warm water and vinegar. Apply with a soft brush or cloth, scrubbing gently to avoid damage. Dry thoroughly to prevent moisture buildup.

Is It Safe To Clean The Exterior Of Double-Glazed Windows?

Yes, but take precautions. If using a ladder, ensure stability and avoid overreaching. For high or hard-to-reach windows, consider professional cleaning services.

How Do I Maintain The Seals Around My Double-Glazed Doors And Windows?

Regularly inspect seals for wear or gaps. If minor issues are found, apply a silicone sealant. Severely damaged seals should be professionally replaced to prevent air leaks and moisture infiltration.

Click how to clean double glazed windows for more details.